Jamma boards that use -5v???

[Escape-To-88]

Should really remember this but haven't built a supergun in a while and forgot which game boards actually need the -5v line?
Is it Midway boards - NBA Jam etc. becuase of the sound? Or is my memory failing me?
any help appreciated

[J0e Musashi]

Yer Midway duder. For the sound board. MK, MK2 NBA jam etc.

[Escape-To-88]

thanks mate